PurpleSec

PurpleSec is a Washington, DC-based cybersecurity firm founded in 2019 by practitioners with backgrounds in defense, government, and regulated industries. Organizations use PurpleSec for AI security assessments, penetration testing, vulnerability management, virtual CISO services, and compliance support across frameworks such as HIPAA, CMMC, NIST 800-171, and ISO 27001. Its flagship offerings include Defiance XDR - a cloud-based managed detection and response platform - and PromptShield, an AI security layer designed to prevent prompt injection, data leakage, and unsafe AI actions. PurpleSec primarily serves SMBs and startups, positioning itself as a long-term security partner rather than a transactional vendor. Cyberin enables security teams to evaluate PurpleSec alongside alternative solutions in the managed security services space.